/*
- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (C) 1988, 1989, NeXT, Inc.
* 21-Jul-88 Avadis Tevanian, Jr. (avie) at NeXT
* Started.
*/
+
#include <sys/param.h>
-#include <sys/vnode.h>
+#include <sys/vnode_internal.h>
#include <sys/uio.h>
#include <sys/namei.h>
-#include <sys/proc.h>
+#include <sys/proc_internal.h>
+#include <sys/kauth.h>
#include <sys/stat.h>
#include <sys/malloc.h>
-#include <sys/mount.h>
+#include <sys/mount_internal.h>
#include <sys/fcntl.h>
-#include <sys/ubc.h>
+#include <sys/ubc_internal.h>
+#include <sys/imgact.h>
#include <mach/mach_types.h>
+#include <mach/vm_map.h> /* vm_allocate() */
+#include <mach/mach_vm.h> /* mach_vm_allocate() */
+#include <mach/vm_statistics.h>
+#include <mach/task.h>
+#include <mach/thread_act.h>
+
+#include <machine/vmparam.h>
+#include <machine/exec.h>
+#include <kern/kern_types.h>
+#include <kern/cpu_number.h>
#include <kern/mach_loader.h>
+#include <kern/kalloc.h>
#include <kern/task.h>
+#include <kern/thread.h>
#include <mach-o/fat.h>
#include <mach-o/loader.h>
-#include <kern/cpu_number.h>
-
+#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_pager.h>
#include <vm/vnode_pager.h>
-#include <mach/vm_statistics.h>
+#include <vm/vm_protos.h>
-#include <mach/shared_memory_server.h>
-#include <vm/vm_shared_memory_server.h>
+/*
+ * XXX vm/pmap.h should not treat these prototypes as MACH_KERNEL_PRIVATE
+ * when KERNEL is defined.
+ */
+extern pmap_t pmap_create(vm_map_size_t size, boolean_t is_64bit);
+extern void pmap_switch(pmap_t);
-#include <machine/vmparam.h>
+/*
+ * XXX kern/thread.h should not treat these prototypes as MACH_KERNEL_PRIVATE
+ * when KERNEL is defined.
+ */
+extern kern_return_t thread_setstatus(thread_t thread, int flavor,
+ thread_state_t tstate,
+ mach_msg_type_number_t count);
+
+extern kern_return_t thread_state_initialize(thread_t thread);
+
+
+/* XXX should have prototypes in a shared header file */
+extern int get_map_nentries(vm_map_t);
+extern kern_return_t thread_userstack(thread_t, int, thread_state_t,
+ unsigned int, mach_vm_offset_t *, int *);
+extern kern_return_t thread_entrypoint(thread_t, int, thread_state_t,
+ unsigned int, mach_vm_offset_t *);
+
+extern kern_return_t memory_object_signed(memory_object_control_t control,
+ boolean_t is_signed);
+
+/* An empty load_result_t */
+static load_result_t load_result_null = {
+ .mach_header = MACH_VM_MIN_ADDRESS,
+ .entry_point = MACH_VM_MIN_ADDRESS,
+ .user_stack = MACH_VM_MIN_ADDRESS,
+ .thread_count = 0,
+ .unixproc = 0,
+ .dynlinker = 0,
+ .customstack = 0,
+ .csflags = 0
+};
/*
* Prototypes of static functions.
*/
-static
-load_return_t
+static load_return_t
parse_machfile(
struct vnode *vp,
- vm_map_t map,
- thread_act_t thr_act,
+ vm_map_t map,
+ thread_t thread,
struct mach_header *header,
- unsigned long file_offset,
- unsigned long macho_size,
- int depth,
- load_result_t *result,
- boolean_t clean_regions
-),
+ off_t file_offset,
+ off_t macho_size,
+ int depth,
+ load_result_t *result
+);
+
+static load_return_t
load_segment(
struct segment_command *scp,
void * pager,
- unsigned long pager_offset,
- unsigned long macho_size,
- unsigned long end_of_file,
+ off_t pager_offset,
+ off_t macho_size,
+ off_t end_of_file,
vm_map_t map,
load_result_t *result
-),
+);
+
+static load_return_t
+load_segment_64(
+ struct segment_command_64 *scp64,
+ void *pager,
+ off_t pager_offset,
+ off_t macho_size,
+ off_t end_of_file,
+ vm_map_t map,
+ load_result_t *result
+);
+
+int load_code_signature(
+ struct linkedit_data_command *lcp,
+ struct vnode *vp,
+ off_t macho_offset,
+ off_t macho_size,
+ cpu_type_t cputype,
+ load_result_t *result);
+
+static load_return_t
load_unixthread(
struct thread_command *tcp,
- thread_act_t thr_act,
+ thread_t thread,
load_result_t *result
-),
+);
+
+static load_return_t
load_thread(
struct thread_command *tcp,
- thread_act_t thr_act,
+ thread_t thread,
load_result_t *result
-),
+);
+
+static load_return_t
load_threadstate(
thread_t thread,
unsigned long *ts,
unsigned long total_size
-),
+);
+
+static load_return_t
load_threadstack(
thread_t thread,
unsigned long *ts,
unsigned long total_size,
- vm_offset_t *user_stack,
+ user_addr_t *user_stack,
int *customstack
-),
+);
+
+static load_return_t
load_threadentry(
thread_t thread,
unsigned long *ts,
unsigned long total_size,
- vm_offset_t *entry_point
-),
+ mach_vm_offset_t *entry_point
+);
+
+static load_return_t
load_dylinker(
struct dylinker_command *lcp,
+ integer_t archbits,
vm_map_t map,
- thread_act_t thr_act,
+ thread_t thread,
int depth,
load_result_t *result,
- boolean_t clean_regions
-),
+ boolean_t is_64bit
+);
+
+static load_return_t
get_macho_vnode(
char *path,
+ integer_t archbits,
struct mach_header *mach_header,
- unsigned long *file_offset,
- unsigned long *macho_size,
+ off_t *file_offset,
+ off_t *macho_size,
struct vnode **vpp
);
load_return_t
load_machfile(
- struct vnode *vp,
+ struct image_params *imgp,
struct mach_header *header,
- unsigned long file_offset,
- unsigned long macho_size,
- load_result_t *result,
- thread_act_t thr_act,
+ thread_t thread,
vm_map_t new_map,
- boolean_t clean_regions
+ load_result_t *result
)
{
- pmap_t pmap;
+ struct vnode *vp = imgp->ip_vp;
+ off_t file_offset = imgp->ip_arch_offset;
+ off_t macho_size = imgp->ip_arch_size;
+
+ pmap_t pmap = 0; /* protected by create_map */
vm_map_t map;
vm_map_t old_map;
load_result_t myresult;
- kern_return_t kret;
load_return_t lret;
boolean_t create_map = TRUE;
-#ifndef i386
- extern pmap_t pmap_create(vm_size_t size); /* XXX */
-#endif
if (new_map != VM_MAP_NULL) {
create_map = FALSE;
if (create_map) {
old_map = current_map();
-#ifdef i386
- pmap = get_task_pmap(current_task());
- pmap_reference(pmap);
-#else
- pmap = pmap_create((vm_size_t) 0);
-#endif
+ pmap = pmap_create((vm_map_size_t) 0, (imgp->ip_flags & IMGPF_IS_64BIT));
map = vm_map_create(pmap,
- get_map_min(old_map),
- get_map_max(old_map),
- TRUE); /**** FIXME ****/
+ 0,
+ vm_compute_max_offset((imgp->ip_flags & IMGPF_IS_64BIT)),
+ TRUE);
} else
map = new_map;
+
+ if ( (header->flags & MH_ALLOW_STACK_EXECUTION) )
+ vm_map_disable_NX(map);
if (!result)
result = &myresult;
- *result = (load_result_t) { 0 };
+ *result = load_result_null;
- lret = parse_machfile(vp, map, thr_act, header, file_offset, macho_size,
- 0, result, clean_regions);
+ lret = parse_machfile(vp, map, thread, header, file_offset, macho_size,
+ 0, result);
if (lret != LOAD_SUCCESS) {
if (create_map) {
return(lret);
}
+ /*
+ * For 64-bit users, check for presence of a 4GB page zero
+ * which will enable the kernel to share the user's address space
+ * and hence avoid TLB flushes on kernel entry/exit
+ */
+ if ((imgp->ip_flags & IMGPF_IS_64BIT) &&
+ vm_map_has_4GB_pagezero(map))
+ vm_map_set_4GB_pagezero(map);
+
/*
* Commit to new map. First make sure that the current
* users of the task get done with it, and that we clean
* That lets us get off the pmap associated with it, and
* then we can release it.
*/
+
if (create_map) {
task_halt(current_task());
old_map = swap_task_map(current_task(), map);
-#ifndef i386
+ vm_map_clear_4GB_pagezero(old_map);
pmap_switch(pmap); /* Make sure we are using the new pmap */
-#endif
vm_map_deallocate(old_map);
}
return(LOAD_SUCCESS);
}
-int dylink_test = 1;
-
+/*
+ * The file size of a mach-o file is limited to 32 bits; this is because
+ * this is the limit on the kalloc() of enough bytes for a mach_header and
+ * the contents of its sizeofcmds, which is currently constrained to 32
+ * bits in the file format itself. We read into the kernel buffer the
+ * commands section, and then parse it in order to parse the mach-o file
+ * format load_command segment(s). We are only interested in a subset of
+ * the total set of possible commands.
+ */
static
load_return_t
parse_machfile(
- struct vnode *vp,
+ struct vnode *vp,
vm_map_t map,
- thread_act_t thr_act,
+ thread_t thread,
struct mach_header *header,
- unsigned long file_offset,
- unsigned long macho_size,
+ off_t file_offset,
+ off_t macho_size,
int depth,
- load_result_t *result,
- boolean_t clean_regions
+ load_result_t *result
)
{
- struct machine_slot *ms;
- int ncmds;
- struct load_command *lcp, *next;
+ uint32_t ncmds;
+ struct load_command *lcp;
struct dylinker_command *dlp = 0;
+ integer_t dlarchbits = 0;
void * pager;
load_return_t ret = LOAD_SUCCESS;
- vm_offset_t addr, kl_addr;
+ caddr_t addr;
+ void * kl_addr;
vm_size_t size,kl_size;
- int offset;
+ size_t offset;
+ size_t oldoffset; /* for overflow check */
int pass;
- struct proc *p = current_proc(); /* XXXX */
+ proc_t p = current_proc(); /* XXXX */
int error;
int resid=0;
task_t task;
+ size_t mach_header_sz = sizeof(struct mach_header);
+ boolean_t abi64;
+ boolean_t got_code_signatures = FALSE;
+
+ if (header->magic == MH_MAGIC_64 ||
+ header->magic == MH_CIGAM_64) {
+ mach_header_sz = sizeof(struct mach_header_64);
+ }
/*
* Break infinite recursion
*/
- if (depth > 6)
+ if (depth > 6) {
return(LOAD_FAILURE);
+ }
- task = (task_t)get_threadtask(thr_act);
+ task = (task_t)get_threadtask(thread);
depth++;
/*
* Check to see if right machine type.
*/
- ms = &machine_slot[cpu_number()];
- if ((header->cputype != ms->cpu_type) ||
- !check_cpu_subtype(header->cpusubtype))
+ if (((cpu_type_t)(header->cputype & ~CPU_ARCH_MASK) != cpu_type()) ||
+ !grade_binary(header->cputype,
+ header->cpusubtype & ~CPU_SUBTYPE_MASK))
return(LOAD_BADARCH);
+ abi64 = ((header->cputype & CPU_ARCH_ABI64) == CPU_ARCH_ABI64);
+
switch (header->filetype) {
case MH_OBJECT:
case MH_EXECUTE:
case MH_PRELOAD:
- if (depth != 1)
+ if (depth != 1) {
return (LOAD_FAILURE);
+ }
break;
case MH_FVMLIB:
case MH_DYLIB:
- if (depth == 1)
+ if (depth == 1) {
return (LOAD_FAILURE);
+ }
break;
case MH_DYLINKER:
- if (depth != 2)
+ if (depth != 2) {
return (LOAD_FAILURE);
+ }
break;
default:
/*
* Get the pager for the file.
*/
- UBCINFOCHECK("parse_machfile", vp);
pager = (void *) ubc_getpager(vp);
/*
* Map portion that must be accessible directly into
* kernel's map.
*/
- if ((sizeof (struct mach_header) + header->sizeofcmds) > macho_size)
+ if ((mach_header_sz + header->sizeofcmds) > macho_size)
return(LOAD_BADMACHO);
/*
* Round size of Mach-O commands up to page boundry.
*/
- size = round_page_32(sizeof (struct mach_header) + header->sizeofcmds);
+ size = round_page(mach_header_sz + header->sizeofcmds);
if (size <= 0)
return(LOAD_BADMACHO);
addr = 0;
kl_size = size;
kl_addr = kalloc(size);
- addr = kl_addr;
+ addr = (caddr_t)kl_addr;
if (addr == NULL)
return(LOAD_NOSPACE);
- if(error = vn_rdwr(UIO_READ, vp, (caddr_t)addr, size, file_offset,
- UIO_SYSSPACE, 0, p->p_ucred, &resid, p)) {
+ error = vn_rdwr(UIO_READ, vp, addr, size, file_offset,
+ UIO_SYSSPACE32, 0, kauth_cred_get(), &resid, p);
+ if (error) {
if (kl_addr )
kfree(kl_addr, kl_size);
return(LOAD_IOERROR);
}
- /* ubc_map(vp); */ /* NOT HERE */
+ /* (void)ubc_map(vp, PROT_EXEC); */ /* NOT HERE */
/*
* Scan through the commands, processing each one as necessary.
*/
for (pass = 1; pass <= 2; pass++) {
- offset = sizeof(struct mach_header);
+ /*
+ * Loop through each of the load_commands indicated by the
+ * Mach-O header; if an absurd value is provided, we just
+ * run off the end of the reserved section by incrementing
+ * the offset too far, so we are implicitly fail-safe.
+ */
+ offset = mach_header_sz;
ncmds = header->ncmds;
while (ncmds--) {
/*
* Get a pointer to the command.
*/
lcp = (struct load_command *)(addr + offset);
+ oldoffset = offset;
offset += lcp->cmdsize;
/*
- * Check for valid lcp pointer by checking
- * next offset.
+ * Perform prevalidation of the struct load_command
+ * before we attempt to use its contents. Invalid
+ * values are ones which result in an overflow, or
+ * which can not possibly be valid commands, or which
+ * straddle or exist past the reserved section at the
+ * start of the image.
*/
- if (offset > header->sizeofcmds
- + sizeof(struct mach_header)) {
- if (kl_addr )
- kfree(kl_addr, kl_size);
- return(LOAD_BADMACHO);
+ if (oldoffset > offset ||
+ lcp->cmdsize < sizeof(struct load_command) ||
+ offset > header->sizeofcmds + mach_header_sz) {
+ ret = LOAD_BADMACHO;
+ break;
}
/*
- * Check for valid command.
+ * Act on struct load_command's for which kernel
+ * intervention is required.
*/
switch(lcp->cmd) {
+ case LC_SEGMENT_64:
+ if (pass != 1)
+ break;
+ ret = load_segment_64(
+ (struct segment_command_64 *)lcp,
+ pager,
+ file_offset,
+ macho_size,
+ ubc_getsize(vp),
+ map,
+ result);
+ break;
case LC_SEGMENT:
if (pass != 1)
break;
ret = load_segment(
(struct segment_command *) lcp,
- pager, file_offset,
+ pager,
+ file_offset,
macho_size,
- (unsigned long)ubc_getsize(vp),
+ ubc_getsize(vp),
map,
result);
break;
case LC_THREAD:
if (pass != 2)
break;
- ret = load_thread((struct thread_command *)lcp, thr_act,
+ ret = load_thread((struct thread_command *)lcp,
+ thread,
result);
break;
case LC_UNIXTHREAD:
if (pass != 2)
break;
ret = load_unixthread(
- (struct thread_command *) lcp, thr_act,
+ (struct thread_command *) lcp,
+ thread,
result);
break;
case LC_LOAD_DYLINKER:
if (pass != 2)
break;
- if ((depth == 1) && (dlp == 0))
+ if ((depth == 1) && (dlp == 0)) {
dlp = (struct dylinker_command *)lcp;
- else
+ dlarchbits = (header->cputype & CPU_ARCH_MASK);
+ } else {
ret = LOAD_FAILURE;
+ }
+ break;
+ case LC_CODE_SIGNATURE:
+ /* CODE SIGNING */
+ if (pass != 2)
+ break;
+ /* pager -> uip ->
+ load signatures & store in uip
+ set VM object "signed_pages"
+ */
+ ret = load_code_signature(
+ (struct linkedit_data_command *) lcp,
+ vp,
+ file_offset,
+ macho_size,
+ header->cputype,
+ (depth == 1) ? result : NULL);
+ if (ret != LOAD_SUCCESS) {
+ printf("proc %d: load code signature error %d "
+ "for file \"%s\"\n",
+ p->p_pid, ret, vp->v_name);
+ ret = LOAD_SUCCESS; /* ignore error */
+ } else {
+ got_code_signatures = TRUE;
+ }
break;
default:
- ret = LOAD_SUCCESS;/* ignore other stuff */
+ /* Other commands are ignored by the kernel */
+ ret = LOAD_SUCCESS;
+ break;
}
if (ret != LOAD_SUCCESS)
break;
if (ret != LOAD_SUCCESS)
break;
}
- if ((ret == LOAD_SUCCESS) && (depth == 1)) {
- vm_offset_t addr;
- shared_region_mapping_t shared_region;
- struct shared_region_task_mappings map_info;
- shared_region_mapping_t next;
-
-RedoLookup:
- vm_get_shared_region(task, &shared_region);
- map_info.self = (vm_offset_t)shared_region;
- shared_region_mapping_info(shared_region,
- &(map_info.text_region),
- &(map_info.text_size),
- &(map_info.data_region),
- &(map_info.data_size),
- &(map_info.region_mappings),
- &(map_info.client_base),
- &(map_info.alternate_base),
- &(map_info.alternate_next),
- &(map_info.fs_base),
- &(map_info.system),
- &(map_info.flags), &next);
-
- if((map_info.flags & SHARED_REGION_FULL) ||
- (map_info.flags & SHARED_REGION_STALE)) {
- shared_region_mapping_t system_region;
- system_region = lookup_default_shared_region(
- map_info.fs_base, map_info.system);
- if((map_info.self != (vm_offset_t)system_region) &&
- (map_info.flags & SHARED_REGION_SYSTEM)) {
- if(system_region == NULL) {
- shared_file_boot_time_init(
- map_info.fs_base, map_info.system);
- } else {
- vm_set_shared_region(task, system_region);
- }
- shared_region_mapping_dealloc(
- (shared_region_mapping_t)map_info.self);
- goto RedoLookup;
- } else if (map_info.flags & SHARED_REGION_SYSTEM) {
- shared_region_mapping_dealloc(system_region);
- shared_file_boot_time_init(
- map_info.fs_base, map_info.system);
- shared_region_mapping_dealloc(
- (shared_region_mapping_t)map_info.self);
- } else {
- shared_region_mapping_dealloc(system_region);
- }
- }
-
-
- if (dylink_test) {
- p->p_flag |= P_NOSHLIB; /* no shlibs in use */
- addr = map_info.client_base;
- if(clean_regions) {
- vm_map(map, &addr, map_info.text_size,
- 0, SHARED_LIB_ALIAS,
- map_info.text_region, 0, FALSE,
- VM_PROT_READ, VM_PROT_READ, VM_INHERIT_SHARE);
- } else {
- vm_map(map, &addr, map_info.text_size, 0,
- (VM_MEMORY_SHARED_PMAP << 24)
- | SHARED_LIB_ALIAS,
- map_info.text_region, 0, FALSE,
- VM_PROT_READ, VM_PROT_READ, VM_INHERIT_SHARE);
- }
- addr = map_info.client_base + map_info.text_size;
- vm_map(map, &addr, map_info.data_size,
- 0, SHARED_LIB_ALIAS,
- map_info.data_region, 0, TRUE,
- VM_PROT_READ, VM_PROT_READ, VM_INHERIT_SHARE);
-
- while (next) {
- /* this should be fleshed out for the general case */
- /* but this is not necessary for now. Indeed we */
- /* are handling the com page inside of the */
- /* shared_region mapping create calls for now for */
- /* simplicities sake. If more general support is */
- /* needed the code to manipulate the shared range */
- /* chain can be pulled out and moved to the callers*/
- shared_region_mapping_info(next,
- &(map_info.text_region),
- &(map_info.text_size),
- &(map_info.data_region),
- &(map_info.data_size),
- &(map_info.region_mappings),
- &(map_info.client_base),
- &(map_info.alternate_base),
- &(map_info.alternate_next),
- &(map_info.fs_base),
- &(map_info.system),
- &(map_info.flags), &next);
-
- addr = map_info.client_base;
- vm_map(map, &addr, map_info.text_size,
- 0, SHARED_LIB_ALIAS,
- map_info.text_region, 0, FALSE,
- VM_PROT_READ, VM_PROT_READ, VM_INHERIT_SHARE);
- }
+ if (ret == LOAD_SUCCESS) {
+ if (! got_code_signatures) {
+ struct cs_blob *blob;
+ /* no embedded signatures: look for detached ones */
+ blob = ubc_cs_blob_get(vp, -1, file_offset);
+ if (blob != NULL) {
+ /* get flags to be applied to the process */
+ result->csflags |= blob->csb_flags;
+ }
+ }
+
+ if (dlp != 0)
+ ret = load_dylinker(dlp, dlarchbits, map, thread, depth, result, abi64);
+
+ if(depth == 1) {
+ if (result->thread_count == 0) {
+ ret = LOAD_FAILURE;
+ } else if ( abi64 ) {
+#ifdef __ppc__
+ /* Map in 64-bit commpage */
+ /* LP64todo - make this clean */
+ /*
+ * PPC51: ppc64 is limited to 51-bit addresses.
+ * Memory above that limit is handled specially
+ * at the pmap level.
+ */
+ pmap_map_sharedpage(current_task(), get_map_pmap(map));
+#endif /* __ppc__ */
}
- if (dlp != 0) {
- ret = load_dylinker(dlp, map, thr_act,
- depth, result, clean_regions);
- }
+ }
}
if (kl_addr )
kfree(kl_addr, kl_size);
- if ((ret == LOAD_SUCCESS) && (depth == 1) &&
- (result->thread_count == 0))
- ret = LOAD_FAILURE;
if (ret == LOAD_SUCCESS)
- ubc_map(vp);
+ (void)ubc_map(vp, PROT_READ | PROT_EXEC);
return(ret);
}
+#ifdef __i386__
+
+#define APPLE_UNPROTECTED_HEADER_SIZE (3 * PAGE_SIZE_64)
+
+static load_return_t
+unprotect_segment_64(
+ uint64_t file_off,
+ uint64_t file_size,
+ vm_map_t map,
+ vm_map_offset_t map_addr,
+ vm_map_size_t map_size)
+{
+ kern_return_t kr;
+
+ /*
+ * The first APPLE_UNPROTECTED_HEADER_SIZE bytes (from offset 0 of
+ * this part of a Universal binary) are not protected...
+ * The rest needs to be "transformed".
+ */
+ if (file_off <= APPLE_UNPROTECTED_HEADER_SIZE &&
+ file_off + file_size <= APPLE_UNPROTECTED_HEADER_SIZE) {
+ /* it's all unprotected, nothing to do... */
+ kr = KERN_SUCCESS;
+ } else {
+ if (file_off <= APPLE_UNPROTECTED_HEADER_SIZE) {
+ /*
+ * We start mapping in the unprotected area.
+ * Skip the unprotected part...
+ */
+ vm_map_offset_t delta;
+
+ delta = APPLE_UNPROTECTED_HEADER_SIZE;
+ delta -= file_off;
+ map_addr += delta;
+ map_size -= delta;
+ }
+ /* ... transform the rest of the mapping. */
+ kr = vm_map_apple_protected(map,
+ map_addr,
+ map_addr + map_size);
+ }
+
+ if (kr != KERN_SUCCESS) {
+ return LOAD_FAILURE;
+ }
+ return LOAD_SUCCESS;
+}
+#else /* __i386__ */
+#define unprotect_segment_64(file_off, file_size, map, map_addr, map_size) \
+ LOAD_SUCCESS
+#endif /* __i386__ */
+
static
load_return_t
load_segment(
struct segment_command *scp,
void * pager,
- unsigned long pager_offset,
- unsigned long macho_size,
- unsigned long end_of_file,
+ off_t pager_offset,
+ off_t macho_size,
+ __unused off_t end_of_file,
vm_map_t map,
load_result_t *result
)
kern_return_t ret;
vm_offset_t map_addr, map_offset;
vm_size_t map_size, seg_size, delta_size;
- caddr_t tmp;
vm_prot_t initprot;
vm_prot_t maxprot;
*/
if (scp->fileoff + scp->filesize > macho_size)
return (LOAD_BADMACHO);
+ /*
+ * Make sure the segment is page-aligned in the file.
+ */
+ if ((scp->fileoff & PAGE_MASK) != 0)
+ return LOAD_BADMACHO;
- seg_size = round_page_32(scp->vmsize);
+ seg_size = round_page(scp->vmsize);
if (seg_size == 0)
return(KERN_SUCCESS);
/*
* Round sizes to page size.
*/
- map_size = round_page_32(scp->filesize);
- map_addr = trunc_page_32(scp->vmaddr);
+ map_size = round_page(scp->filesize);
+ map_addr = trunc_page(scp->vmaddr);
+
+#if 0 /* XXX (4596982) this interferes with Rosetta */
+ if (map_addr == 0 &&
+ map_size == 0 &&
+ seg_size != 0 &&
+ (scp->initprot & VM_PROT_ALL) == VM_PROT_NONE &&
+ (scp->maxprot & VM_PROT_ALL) == VM_PROT_NONE) {
+ /*
+ * This is a "page zero" segment: it starts at address 0,
+ * is not mapped from the binary file and is not accessible.
+ * User-space should never be able to access that memory, so
+ * make it completely off limits by raising the VM map's
+ * minimum offset.
+ */
+ ret = vm_map_raise_min_offset(map, (vm_map_offset_t) seg_size);
+ if (ret != KERN_SUCCESS) {
+ return LOAD_FAILURE;
+ }
+ return LOAD_SUCCESS;
+ }
+#endif
map_offset = pager_offset + scp->fileoff;
* Map a copy of the file into the address space.
*/
ret = vm_map(map,
- &map_addr, map_size, (vm_offset_t)0, FALSE,
- pager, map_offset, TRUE,
+ &map_addr, map_size, (vm_offset_t)0,
+ VM_FLAGS_FIXED, pager, map_offset, TRUE,
initprot, maxprot,
VM_INHERIT_DEFAULT);
if (ret != KERN_SUCCESS)
if (delta_size > 0) {
vm_offset_t tmp;
- ret = vm_allocate(kernel_map, &tmp, delta_size, TRUE);
+ ret = vm_allocate(kernel_map, &tmp, delta_size, VM_FLAGS_ANYWHERE);
if (ret != KERN_SUCCESS)
return(LOAD_RESOURCE);
if (delta_size > 0) {
vm_offset_t tmp = map_addr + map_size;
- ret = vm_allocate(map, &tmp, delta_size, FALSE);
+ ret = vm_map(map, &tmp, delta_size, 0, VM_FLAGS_FIXED,
+ NULL, 0, FALSE,
+ scp->initprot, scp->maxprot,
+ VM_INHERIT_DEFAULT);
if (ret != KERN_SUCCESS)
return(LOAD_NOSPACE);
}
- /*
- * Set protection values. (Note: ignore errors!)
- */
-
- if (scp->maxprot != VM_PROT_DEFAULT) {
- (void) vm_protect(map,
- map_addr, seg_size,
- TRUE, scp->maxprot);
- }
- if (scp->initprot != VM_PROT_DEFAULT) {
- (void) vm_protect(map,
- map_addr, seg_size,
- FALSE, scp->initprot);
- }
if ( (scp->fileoff == 0) && (scp->filesize != 0) )
result->mach_header = map_addr;
- return(LOAD_SUCCESS);
+
+ if (scp->flags & SG_PROTECTED_VERSION_1) {
+ ret = unprotect_segment_64((uint64_t) scp->fileoff,
+ (uint64_t) scp->filesize,
+ map,
+ (vm_map_offset_t) map_addr,
+ (vm_map_size_t) map_size);
+ } else {
+ ret = LOAD_SUCCESS;
+ }
+
+ return ret;
}
static
load_return_t
-load_unixthread(
- struct thread_command *tcp,
- thread_act_t thread,
+load_segment_64(
+ struct segment_command_64 *scp64,
+ void * pager,
+ off_t pager_offset,
+ off_t macho_size,
+ __unused off_t end_of_file,
+ vm_map_t map,
load_result_t *result
)
{
- load_return_t ret;
- int customstack =0;
+ kern_return_t ret;
+ mach_vm_offset_t map_addr, map_offset;
+ mach_vm_size_t map_size, seg_size, delta_size;
+ vm_prot_t initprot;
+ vm_prot_t maxprot;
- if (result->thread_count != 0)
- return (LOAD_FAILURE);
+ /*
+ * Make sure what we get from the file is really ours (as specified
+ * by macho_size).
+ */
+ if (scp64->fileoff + scp64->filesize > (uint64_t)macho_size)
+ return (LOAD_BADMACHO);
+ /*
+ * Make sure the segment is page-aligned in the file.
+ */
+ if ((scp64->fileoff & PAGE_MASK_64) != 0)
+ return LOAD_BADMACHO;
+
+ seg_size = round_page_64(scp64->vmsize);
+ if (seg_size == 0)
+ return(KERN_SUCCESS);
+
+ /*
+ * Round sizes to page size.
+ */
+ map_size = round_page_64(scp64->filesize); /* limited to 32 bits */
+ map_addr = round_page_64(scp64->vmaddr);
+
+ if (map_addr == 0 &&
+ map_size == 0 &&
+ seg_size != 0 &&
+ (scp64->initprot & VM_PROT_ALL) == VM_PROT_NONE &&
+ (scp64->maxprot & VM_PROT_ALL) == VM_PROT_NONE) {
+ /*
+ * This is a "page zero" segment: it starts at address 0,
+ * is not mapped from the binary file and is not accessible.
+ * User-space should never be able to access that memory, so
+ * make it completely off limits by raising the VM map's
+ * minimum offset.
+ */
+ ret = vm_map_raise_min_offset(map, seg_size);
+ if (ret != KERN_SUCCESS) {
+ return LOAD_FAILURE;
+ }
+ return LOAD_SUCCESS;
+ }
+
+ map_offset = pager_offset + scp64->fileoff; /* limited to 32 bits */
+
+ if (map_size > 0) {
+ initprot = (scp64->initprot) & VM_PROT_ALL;
+ maxprot = (scp64->maxprot) & VM_PROT_ALL;
+ /*
+ * Map a copy of the file into the address space.
+ */
+ ret = mach_vm_map(map,
+ &map_addr, map_size, (mach_vm_offset_t)0,
+ VM_FLAGS_FIXED, pager, map_offset, TRUE,
+ initprot, maxprot,
+ VM_INHERIT_DEFAULT);
+ if (ret != KERN_SUCCESS)
+ return(LOAD_NOSPACE);
- ret = load_threadstack(thread,
- (unsigned long *)(((vm_offset_t)tcp) +
- sizeof(struct thread_command)),
- tcp->cmdsize - sizeof(struct thread_command),
- &result->user_stack,
- &customstack);
- if (ret != LOAD_SUCCESS)
- return(ret);
+ /*
+ * If the file didn't end on a page boundary,
+ * we need to zero the leftover.
+ */
+ delta_size = map_size - scp64->filesize;
+#if FIXME
+ if (delta_size > 0) {
+ mach_vm_offset_t tmp;
+
+ ret = vm_allocate(kernel_map, &tmp, delta_size, VM_FLAGS_ANYWHERE);
+ if (ret != KERN_SUCCESS)
+ return(LOAD_RESOURCE);
+
+ if (copyout(tmp, map_addr + scp64->filesize,
+ delta_size)) {
+ (void) vm_deallocate(
+ kernel_map, tmp, delta_size);
+ return (LOAD_FAILURE);
+ }
+
+ (void) vm_deallocate(kernel_map, tmp, delta_size);
+ }
+#endif /* FIXME */
+ }
- if (customstack)
- result->customstack = 1;
- else
- result->customstack = 0;
- ret = load_threadentry(thread,
- (unsigned long *)(((vm_offset_t)tcp) +
- sizeof(struct thread_command)),
- tcp->cmdsize - sizeof(struct thread_command),
- &result->entry_point);
- if (ret != LOAD_SUCCESS)
- return(ret);
+ /*
+ * If the virtual size of the segment is greater
+ * than the size from the file, we need to allocate
+ * zero fill memory for the rest.
+ */
+ delta_size = seg_size - map_size;
+ if (delta_size > 0) {
+ mach_vm_offset_t tmp = map_addr + map_size;
- ret = load_threadstate(thread,
- (unsigned long *)(((vm_offset_t)tcp) +
- sizeof(struct thread_command)),
- tcp->cmdsize - sizeof(struct thread_command));
- if (ret != LOAD_SUCCESS)
- return (ret);
+ ret = mach_vm_map(map, &tmp, delta_size, 0, VM_FLAGS_FIXED,
+ NULL, 0, FALSE,
+ scp64->initprot, scp64->maxprot,
+ VM_INHERIT_DEFAULT);
+ if (ret != KERN_SUCCESS)
+ return(LOAD_NOSPACE);
+ }
- result->unixproc = TRUE;
- result->thread_count++;
+ if ( (scp64->fileoff == 0) && (scp64->filesize != 0) )
+ result->mach_header = map_addr;
- return(LOAD_SUCCESS);
+ if (scp64->flags & SG_PROTECTED_VERSION_1) {
+ ret = unprotect_segment_64(scp64->fileoff,
+ scp64->filesize,
+ map,
+ map_addr,
+ map_size);
+ } else {
+ ret = LOAD_SUCCESS;
+ }
+
+ return ret;
}
static
load_return_t
load_thread(
struct thread_command *tcp,
- thread_act_t thread,
+ thread_t thread,
load_result_t *result
)
{
task = get_threadtask(thread);
- /* if count is 0; same as thr_act */
+ /* if count is 0; same as thread */
if (result->thread_count != 0) {
kret = thread_create(task, &thread);
if (kret != KERN_SUCCESS)
return(LOAD_RESOURCE);
- act_deallocate(thread);
+ thread_deallocate(thread);
}
lret = load_threadstate(thread,
return(LOAD_SUCCESS);
}
+static
+load_return_t
+load_unixthread(
+ struct thread_command *tcp,
+ thread_t thread,
+ load_result_t *result
+)
+{
+ load_return_t ret;
+ int customstack =0;
+
+ if (result->thread_count != 0) {
+printf("load_unixthread: already have a thread!");
+ return (LOAD_FAILURE);
+ }
+
+ ret = load_threadstack(thread,
+ (unsigned long *)(((vm_offset_t)tcp) +
+ sizeof(struct thread_command)),
+ tcp->cmdsize - sizeof(struct thread_command),
+ &result->user_stack,
+ &customstack);
+ if (ret != LOAD_SUCCESS)
+ return(ret);
+
+ if (customstack)
+ result->customstack = 1;
+ else
+ result->customstack = 0;
+ ret = load_threadentry(thread,
+ (unsigned long *)(((vm_offset_t)tcp) +
+ sizeof(struct thread_command)),
+ tcp->cmdsize - sizeof(struct thread_command),
+ &result->entry_point);
+ if (ret != LOAD_SUCCESS)
+ return(ret);
+
+ ret = load_threadstate(thread,
+ (unsigned long *)(((vm_offset_t)tcp) +
+ sizeof(struct thread_command)),
+ tcp->cmdsize - sizeof(struct thread_command));
+ if (ret != LOAD_SUCCESS)
+ return (ret);
+
+ result->unixproc = TRUE;
+ result->thread_count++;
+
+ return(LOAD_SUCCESS);
+}
+
static
load_return_t
load_threadstate(
kern_return_t ret;
unsigned long size;
int flavor;
+ unsigned long thread_size;
+ ret = thread_state_initialize( thread );
+ if (ret != KERN_SUCCESS) {
+ return(LOAD_FAILURE);
+ }
+
/*
- * Set the thread state.
+ * Set the new thread state; iterate through the state flavors in
+ * the mach-o file.
*/
-
while (total_size > 0) {
flavor = *ts++;
size = *ts++;
- total_size -= (size+2)*sizeof(unsigned long);
- if (total_size < 0)
+ thread_size = (size+2)*sizeof(unsigned long);
+ if (thread_size > total_size)
return(LOAD_BADMACHO);
- ret = thread_setstatus(thread, flavor, ts, size);
- if (ret != KERN_SUCCESS)
+ total_size -= thread_size;
+ /*
+ * Third argument is a kernel space pointer; it gets cast
+ * to the appropriate type in machine_thread_set_state()
+ * based on the value of flavor.
+ */
+ ret = thread_setstatus(thread, flavor, (thread_state_t)ts, size);
+ if (ret != KERN_SUCCESS) {
return(LOAD_FAILURE);
+ }
ts += size; /* ts is a (unsigned long *) */
}
return(LOAD_SUCCESS);
thread_t thread,
unsigned long *ts,
unsigned long total_size,
- vm_offset_t *user_stack,
+ user_addr_t *user_stack,
int *customstack
)
{
kern_return_t ret;
unsigned long size;
int flavor;
+ unsigned long stack_size;
while (total_size > 0) {
flavor = *ts++;
size = *ts++;
- total_size -= (size+2)*sizeof(unsigned long);
- if (total_size < 0)
+ stack_size = (size+2)*sizeof(unsigned long);
+ if (stack_size > total_size)
return(LOAD_BADMACHO);
- *user_stack = USRSTACK;
- ret = thread_userstack(thread, flavor, ts, size,
- user_stack, customstack);
- if (ret != KERN_SUCCESS)
+ total_size -= stack_size;
+
+ /*
+ * Third argument is a kernel space pointer; it gets cast
+ * to the appropriate type in thread_userstack() based on
+ * the value of flavor.
+ */
+ ret = thread_userstack(thread, flavor, (thread_state_t)ts, size, user_stack, customstack);
+ if (ret != KERN_SUCCESS) {
return(LOAD_FAILURE);
+ }
ts += size; /* ts is a (unsigned long *) */
}
return(LOAD_SUCCESS);
thread_t thread,
unsigned long *ts,
unsigned long total_size,
- vm_offset_t *entry_point
+ mach_vm_offset_t *entry_point
)
{
kern_return_t ret;
unsigned long size;
int flavor;
+ unsigned long entry_size;
/*
* Set the thread state.
*/
- *entry_point = 0;
+ *entry_point = MACH_VM_MIN_ADDRESS;
while (total_size > 0) {
flavor = *ts++;
size = *ts++;
- total_size -= (size+2)*sizeof(unsigned long);
- if (total_size < 0)
+ entry_size = (size+2)*sizeof(unsigned long);
+ if (entry_size > total_size)
return(LOAD_BADMACHO);
- ret = thread_entrypoint(thread, flavor, ts, size, entry_point);
- if (ret != KERN_SUCCESS)
+ total_size -= entry_size;
+ /*
+ * Third argument is a kernel space pointer; it gets cast
+ * to the appropriate type in thread_entrypoint() based on
+ * the value of flavor.
+ */
+ ret = thread_entrypoint(thread, flavor, (thread_state_t)ts, size, entry_point);
+ if (ret != KERN_SUCCESS) {
return(LOAD_FAILURE);
+ }
ts += size; /* ts is a (unsigned long *) */
}
return(LOAD_SUCCESS);
load_return_t
load_dylinker(
struct dylinker_command *lcp,
+ integer_t archbits,
vm_map_t map,
- thread_act_t thr_act,
+ thread_t thread,
int depth,
load_result_t *result,
- boolean_t clean_regions
+ boolean_t is_64bit
)
{
char *name;
char *p;
- struct vnode *vp;
+ struct vnode *vp = NULLVP; /* set by get_macho_vnode() */
struct mach_header header;
- unsigned long file_offset;
- unsigned long macho_size;
+ off_t file_offset = 0; /* set by get_macho_vnode() */
+ off_t macho_size = 0; /* set by get_macho_vnode() */
vm_map_t copy_map;
load_result_t myresult;
kern_return_t ret;
vm_map_copy_t tmp;
- vm_offset_t dyl_start, map_addr;
- vm_size_t dyl_length;
- extern pmap_t pmap_create(vm_size_t size); /* XXX */
+ mach_vm_offset_t dyl_start, map_addr;
+ mach_vm_size_t dyl_length;
name = (char *)lcp + lcp->name.offset;
/*
return(LOAD_BADMACHO);
} while (*p++);
- ret = get_macho_vnode(name, &header, &file_offset, &macho_size, &vp);
+ ret = get_macho_vnode(name, archbits, &header, &file_offset, &macho_size, &vp);
if (ret)
return (ret);
- myresult = (load_result_t) { 0 };
+ myresult = load_result_null;
/*
- * Load the Mach-O.
+ * First try to map dyld in directly. This should work most of
+ * the time since there shouldn't normally be something already
+ * mapped to its address.
*/
-
- copy_map = vm_map_create(pmap_create(macho_size),
- get_map_min(map), get_map_max( map), TRUE);
-
- ret = parse_machfile(vp, copy_map, thr_act, &header,
- file_offset, macho_size,
- depth, &myresult, clean_regions);
- if (ret)
- goto out;
-
- if (get_map_nentries(copy_map) > 0) {
+ ret = parse_machfile(vp, map, thread, &header, file_offset, macho_size,
+ depth, &myresult);
- dyl_start = get_map_start(copy_map);
- dyl_length = get_map_end(copy_map) - dyl_start;
+ /*
+ * If it turned out something was in the way, then we'll take
+ * take this longer path to map dyld into a temporary map and
+ * copy it into destination map at a different address.
+ */
- map_addr = dyl_start;
- ret = vm_allocate(map, &map_addr, dyl_length, FALSE);
- if (ret != KERN_SUCCESS) {
- ret = vm_allocate(map, &map_addr, dyl_length, TRUE);
- }
+ if (ret == LOAD_NOSPACE) {
- if (ret != KERN_SUCCESS) {
- ret = LOAD_NOSPACE;
+ /*
+ * Load the Mach-O.
+ * Use a temporary map to do the work.
+ */
+ copy_map = vm_map_create(pmap_create(vm_map_round_page(macho_size),
+ is_64bit),
+ get_map_min(map), get_map_max(map), TRUE);
+ if (VM_MAP_NULL == copy_map) {
+ ret = LOAD_RESOURCE;
goto out;
-
}
- ret = vm_map_copyin(copy_map, dyl_start, dyl_length, TRUE,
- &tmp);
- if (ret != KERN_SUCCESS) {
- (void) vm_map_remove(map,
- map_addr,
- map_addr + dyl_length,
- VM_MAP_NO_FLAGS);
+
+ myresult = load_result_null;
+
+ ret = parse_machfile(vp, copy_map, thread, &header,
+ file_offset, macho_size,
+ depth, &myresult);
+
+ if (ret) {
+ vm_map_deallocate(copy_map);
goto out;
}
+
+ if (get_map_nentries(copy_map) > 0) {
+
+ dyl_start = mach_get_vm_start(copy_map);
+ dyl_length = mach_get_vm_end(copy_map) - dyl_start;
+
+ map_addr = dyl_start;
+ ret = mach_vm_allocate(map, &map_addr, dyl_length, VM_FLAGS_ANYWHERE);
+
+ if (ret != KERN_SUCCESS) {
+ vm_map_deallocate(copy_map);
+ ret = LOAD_NOSPACE;
+ goto out;
+
+ }
- ret = vm_map_copy_overwrite(map, map_addr, tmp, FALSE);
- if (ret != KERN_SUCCESS) {
+ ret = vm_map_copyin(copy_map,
+ (vm_map_address_t)dyl_start,
+ (vm_map_size_t)dyl_length,
+ TRUE, &tmp);
+ if (ret != KERN_SUCCESS) {
+ (void) vm_map_remove(map,
+ vm_map_trunc_page(map_addr),
+ vm_map_round_page(map_addr + dyl_length),
+ VM_MAP_NO_FLAGS);
+ vm_map_deallocate(copy_map);
+ goto out;
+ }
+
+ ret = vm_map_copy_overwrite(map,
+ (vm_map_address_t)map_addr,
+ tmp, FALSE);
+ if (ret != KERN_SUCCESS) {
vm_map_copy_discard(tmp);
(void) vm_map_remove(map,
- map_addr,
- map_addr + dyl_length,
- VM_MAP_NO_FLAGS);
- goto out; }
+ vm_map_trunc_page(map_addr),
+ vm_map_round_page(map_addr + dyl_length),
+ VM_MAP_NO_FLAGS);
+ vm_map_deallocate(copy_map);
+ goto out;
+ }
+
+ if (map_addr != dyl_start)
+ myresult.entry_point += (map_addr - dyl_start);
+ } else {
+ ret = LOAD_FAILURE;
+ }
- if (map_addr != dyl_start)
- myresult.entry_point += (map_addr - dyl_start);
- } else
- ret = LOAD_FAILURE;
+ vm_map_deallocate(copy_map);
+ }
if (ret == LOAD_SUCCESS) {
result->dynlinker = TRUE;
result->entry_point = myresult.entry_point;
- ubc_map(vp);
+ (void)ubc_map(vp, PROT_READ | PROT_EXEC);
}
out:
- vm_map_deallocate(copy_map);
-
- vrele(vp);
+ vnode_put(vp);
return (ret);
}
+int
+load_code_signature(
+ struct linkedit_data_command *lcp,
+ struct vnode *vp,
+ off_t macho_offset,
+ off_t macho_size,
+ cpu_type_t cputype,
+ load_result_t *result)
+{
+ int ret;
+ kern_return_t kr;
+ vm_offset_t addr;
+ int resid;
+ struct cs_blob *blob;
+ int error;
+
+ addr = 0;
+ blob = NULL;
+
+ if (lcp->cmdsize != sizeof (struct linkedit_data_command) ||
+ lcp->dataoff + lcp->datasize > macho_size) {
+ ret = LOAD_BADMACHO;
+ goto out;
+ }
+
+ blob = ubc_cs_blob_get(vp, cputype, -1);
+ if (blob != NULL) {
+ /* we already have a blob for this vnode and cputype */
+ if (blob->csb_cpu_type == cputype &&
+ blob->csb_base_offset == macho_offset &&
+ blob->csb_mem_size == lcp->datasize) {
+ /* it matches the blob we want here: we're done */
+ ret = LOAD_SUCCESS;
+ } else {
+ /* the blob has changed for this vnode: fail ! */
+ ret = LOAD_BADMACHO;
+ }
+ goto out;
+ }
+
+ kr = kmem_alloc(kernel_map, &addr, round_page(lcp->datasize));
+ if (kr != KERN_SUCCESS) {
+ ret = LOAD_NOSPACE;
+ goto out;
+ }
+
+ resid = 0;
+ error = vn_rdwr(UIO_READ,
+ vp,
+ (caddr_t) addr,
+ lcp->datasize,
+ macho_offset + lcp->dataoff,
+ UIO_SYSSPACE32,
+ 0,
+ kauth_cred_get(),
+ &resid,
+ current_proc());
+ if (error || resid != 0) {
+ ret = LOAD_IOERROR;
+ goto out;
+ }
+
+ if (ubc_cs_blob_add(vp,
+ cputype,
+ macho_offset,
+ addr,
+ lcp->datasize)) {
+ ret = LOAD_FAILURE;
+ goto out;
+ } else {
+ /* ubc_cs_blob_add() has consumed "addr" */
+ addr = 0;
+ }
+
+ blob = ubc_cs_blob_get(vp, cputype, -1);
+
+ ret = LOAD_SUCCESS;
+out:
+ if (result && ret == LOAD_SUCCESS) {
+ result->csflags |= blob->csb_flags;
+ }
+ if (addr != 0) {
+ kmem_free(kernel_map, addr, round_page(lcp->datasize));
+ addr = 0;
+ }
+
+ return ret;
+}
+
+/*
+ * This routine exists to support the load_dylinker().
+ *
+ * This routine has its own, separate, understanding of the FAT file format,
+ * which is terrifically unfortunate.
+ */
static
load_return_t
get_macho_vnode(
char *path,
+ integer_t archbits,
struct mach_header *mach_header,
- unsigned long *file_offset,
- unsigned long *macho_size,
+ off_t *file_offset,
+ off_t *macho_size,
struct vnode **vpp
)
{
struct vnode *vp;
- struct vattr attr, *atp;
+ vfs_context_t ctx = vfs_context_current();
+ proc_t p = vfs_context_proc(ctx);
+ kauth_cred_t kerncred;
struct nameidata nid, *ndp;
- struct proc *p = current_proc(); /* XXXX */
boolean_t is_fat;
struct fat_arch fat_arch;
int error = LOAD_SUCCESS;
char pad[512];
} header;
off_t fsize = (off_t)0;
- struct ucred *cred = p->p_ucred;
int err2;
+ /*
+ * Capture the kernel credential for use in the actual read of the
+ * file, since the user doing the execution may have execute rights
+ * but not read rights, but to exec something, we have to either map
+ * or read it into the new process address space, which requires
+ * read rights. This is to deal with lack of common credential
+ * serialization code which would treat NOCRED as "serialize 'root'".
+ */
+ kerncred = vfs_context_ucred(vfs_context_kernel());
+
ndp = &nid;
- atp = &attr;
/* init the namei data to point the file user's program name */
- NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, path, p);
+ NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE32, CAST_USER_ADDR_T(path), ctx);
- if (error = namei(ndp)) {
- if (error == ENOENT)
+ if ((error = namei(ndp)) != 0) {
+ if (error == ENOENT) {
error = LOAD_ENOENT;
- else
+ } else {
error = LOAD_FAILURE;
+ }
return(error);
}
-
+ nameidone(ndp);
vp = ndp->ni_vp;
/* check for regular file */
goto bad1;
}
- /* get attributes */
- if (error = VOP_GETATTR(vp, &attr, cred, p)) {
+ /* get size */
+ if ((error = vnode_size(vp, &fsize, ctx)) != 0) {
error = LOAD_FAILURE;
goto bad1;
}
goto bad1;
}
- if ((vp->v_mount->mnt_flag & MNT_NOSUID) || (p->p_flag & P_TRACED))
- atp->va_mode &= ~(VSUID | VSGID);
-
- /* check access. for root we have to see if any exec bit on */
- if (error = VOP_ACCESS(vp, VEXEC, cred, p)) {
- error = LOAD_PROTECT;
- goto bad1;
- }
- if ((atp->va_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0) {
+ /* check access */
+ if ((error = vnode_authorize(vp, NULL, KAUTH_VNODE_EXECUTE, ctx)) != 0) {
error = LOAD_PROTECT;
goto bad1;
}
- /* hold the vnode for the IO */
- if (UBCINFOEXISTS(vp) && !ubc_hold(vp)) {
- error = LOAD_ENOENT;
- goto bad1;
- }
-
/* try to open it */
- if (error = VOP_OPEN(vp, FREAD, cred, p)) {
+ if ((error = VNOP_OPEN(vp, FREAD, ctx)) != 0) {
error = LOAD_PROTECT;
- ubc_rele(vp);
goto bad1;
}
- if(error = vn_rdwr(UIO_READ, vp, (caddr_t)&header, sizeof(header), 0,
- UIO_SYSSPACE, IO_NODELOCKED, cred, &resid, p)) {
+ if ((error = vn_rdwr(UIO_READ, vp, (caddr_t)&header, sizeof(header), 0,
+ UIO_SYSSPACE32, IO_NODELOCKED, kerncred, &resid, p)) != 0) {
error = LOAD_IOERROR;
goto bad2;
}
- if (header.mach_header.magic == MH_MAGIC)
+ if (header.mach_header.magic == MH_MAGIC ||
+ header.mach_header.magic == MH_MAGIC_64)
is_fat = FALSE;
else if (header.fat_header.magic == FAT_MAGIC ||
header.fat_header.magic == FAT_CIGAM)
if (is_fat) {
/* Look up our architecture in the fat file. */
- error = fatfile_getarch(vp, (vm_offset_t)(&header.fat_header), &fat_arch);
+ error = fatfile_getarch_with_bits(vp, archbits, (vm_offset_t)(&header.fat_header), &fat_arch);
if (error != LOAD_SUCCESS)
goto bad2;
/* Read the Mach-O header out of it */
error = vn_rdwr(UIO_READ, vp, (caddr_t)&header.mach_header,
sizeof(header.mach_header), fat_arch.offset,
- UIO_SYSSPACE, IO_NODELOCKED, cred, &resid, p);
+ UIO_SYSSPACE32, IO_NODELOCKED, kerncred, &resid, p);
if (error) {
error = LOAD_IOERROR;
goto bad2;
}
/* Is this really a Mach-O? */
- if (header.mach_header.magic != MH_MAGIC) {
+ if (header.mach_header.magic != MH_MAGIC &&
+ header.mach_header.magic != MH_MAGIC_64) {
error = LOAD_BADMACHO;
goto bad2;
}
*file_offset = fat_arch.offset;
- *macho_size = fsize = fat_arch.size;
+ *macho_size = fat_arch.size;
} else {
+ /*
+ * Force get_macho_vnode() to fail if the architecture bits
+ * do not match the expected architecture bits. This in
+ * turn causes load_dylinker() to fail for the same reason,
+ * so it ensures the dynamic linker and the binary are in
+ * lock-step. This is potentially bad, if we ever add to
+ * the CPU_ARCH_* bits any bits that are desirable but not
+ * required, since the dynamic linker might work, but we will
+ * refuse to load it because of this check.
+ */
+ if ((cpu_type_t)(header.mach_header.cputype & CPU_ARCH_MASK) != archbits)
+ return(LOAD_BADARCH);
*file_offset = 0;
- *macho_size = fsize = attr.va_size;
+ *macho_size = fsize;
}
*mach_header = header.mach_header;
*vpp = vp;
- if (UBCISVALID(vp))
- ubc_setsize(vp, fsize); /* XXX why? */
+
+ ubc_setsize(vp, fsize);
- VOP_UNLOCK(vp, 0, p);
- ubc_rele(vp);
return (error);
bad2:
- VOP_UNLOCK(vp, 0, p);
- err2 = VOP_CLOSE(vp, FREAD, cred, p);
- ubc_rele(vp);
- vrele(vp);
+ err2 = VNOP_CLOSE(vp, FREAD, ctx);
+ vnode_put(vp);
return (error);
bad1:
- vput(vp);
+ vnode_put(vp);
return(error);
}
projects / apple / xnu.git / blobdiff